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Ultrasonic Investigation of the Effect of Topical Glyceryl Trinitrate on Peripheral Arm Vein Diameter: Implications for Intravenous Nutrition

From the General Infirmary at Leeds, Leeds, UK

Background: It has been suggested that topical glyceryl trinitrate (GTN) ointment may cause venodilatation and hence deter thrombophlebitis. However, objective evidence of an increase in vein diameter has not been demonstrated. Methods: B mode ultrasonography was used to measure arm vein diameter. In a prospective study, measurements were taken before and after 24 hours of exposure to topical GTN. Results: Reproducibility of vein diameter measurement was demonstrated. Basilic veins were larger than cephalic veins, but exposure to GTN ointment for 24 hours was not associated with measurable venodilatation. Conclusions: Ultrasonography enabled noninvasive measurement of intraluminal vein diameter. It is unlikely that GTN prevents thrombophlebitis in superficial arm veins by causing venodilatation. (Journal of Parenteral and Enteral Nutrition 23:360-362, 1999)

Journal of Parenteral and Enteral Nutrition, Vol. 23, No. 6, 360-362 (1999)
DOI: 10.1177/0148607199023006360


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